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Microchip Technology 93LC76CT-E/MNY
- Part No.:
- 93LC76CT-E/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93LC76CT-E/MNY.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,228
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Product details
Overview
93LC76CT-E/MNY from Microchip Technology is an 8Kbit, low-voltage, serial EEPROM with Microwire-compatible 3-wire interface, 2.5–5.5V VCC range, and automotive-grade temperature support (–40°C to +125°C). It features ORG-selectable 8-/16-bit word organization, Program Enable (PE) pin for full-array write protection, self-timed erase/write cycles, and 1,000,000 endurance cycles - deployed in engine control units and ADAS sensor calibration storage.
For engineers reviewing the 93LC76CT-E/MNY datasheet, 93LC76CT-E/MNY pinout, 93LC76CT-E/MNY application, or 93LC76CT-E/MNY equivalent, key selection criteria include automotive temperature qualification, PE-controlled write-protection integrity, ORG-configurable memory mapping, and compatibility with legacy Microwire host controllers requiring no protocol translation.
Technical Context
The 93LC76CT-E/MNY implements a synchronous serial Microwire interface with CS/CLK/DI/DO signaling and dedicated PE/ORG control pins. Its architecture supports both x8 (ORG = 0) and x16 (ORG = 1) configurations, with instruction decoding dependent on opcode width and address length - 10-bit addressing for x8 mode (1024 × 8), 9-bit for x16 mode (512 × 16).
Internal logic enforces power-on write inhibition via voltage detection (VPOR = 1.5V typ.), automatic ERAL before WRAL, and Ready/Busy status polling via DO pin during self-timed programming. All erase/write operations require prior EWEN command execution and valid PE = high assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8 or 512 × 16, configurable via ORG pin) |
| VCC range | 2.5–5.5 V - supports direct connection to 3.3V and 5V microcontroller I/O rails without level shifters |
| Temperature grade | Automotive (–40°C to +125°C) - qualified for under-hood and safety-critical ECUs |
| Endurance | 1,000,000 erase/write cycles - enables frequent calibration data updates over vehicle lifetime |
| Data retention | >200 years at +25°C - ensures firmware parameter persistence across product lifecycle |
| Write cycle time | 5 ms (TWC) - deterministic timing for real-time system interrupt handling during programming |
| Interface | Microwire 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage; compatible with legacy PIC® and dsPIC® peripherals |
Pinout & Package
93LC76CT-E/MNY is housed in an 8-lead 2×3 mm DFN package (MNY suffix), with exposed pad connected to VSS. Pin functions are electrically identical to SOIC/PDIP variants but optimized for space-constrained automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal state |
| CLK | Serial Clock | Rising-edge synchronized I/O; clock can be paused mid-transfer without corruption |
| DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; shares net with DO in bidirectional mode (requires series resistor) |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all signals; exposed pad must be soldered to PCB ground plane for thermal and EMI performance |
| ORG | Organization select | Logic high → x16 mode (512 words); logic low → x8 mode (1024 words); must be statically biased |
| PE | Program Enable | Must be high to execute EWEN, ERASE, WRITE, WRAL; tied low for permanent write lock |
| VCC | Power supply | 2.5–5.5 V; internal POR circuit blocks writes below 1.5 V to prevent partial writes during brownout |
Key Features
| Feature | Design Value |
|---|---|
| ORG-selectable word size | Enables single BOM for 8-bit or 16-bit host systems - eliminates dual part stocking |
| Program Enable (PE) pin | Hardware-level write protection independent of software state - prevents firmware corruption during reset or crash |
| Self-timed erase/write | Removes need for external timing control or watchdog timeout extension during programming |
| Auto-ERAL before WRAL | Guarantees clean array state before bulk write - eliminates risk of residual data corruption |
| Ready/Busy polling via DO | Allows non-blocking host operation - CPU can service other tasks while EEPROM programs |
Applications
| Engine Control Unit (ECU) Calibration Storage | Advanced Driver Assistance Systems (ADAS) Sensor Trim |
|---|---|
Use Scenario: Storing adaptive fuel trim tables and ignition timing maps updated during vehicle operation. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to MCU SPI-compatible Microwire peripheral. Use Value: Automotive temperature rating ensures reliability across cold-start to under-hood thermal cycling; 1M endurance supports daily recalibration over 15+ year vehicle life. | Use Scenario: Holding factory-trimmed offset/gain coefficients for radar and camera sensors subject to thermal drift. IC Role / Device Role / Timing Role: Parameter storage accessed during sensor initialization and periodic self-calibration routines. Use Value: PE pin enables hardware-enforced write lock after initial programming - prevents accidental overwrite during field diagnostics or OTA updates. |
| Infotainment System User Profile Memory | Electric Power Steering (EPS) Motor Control Parameters |
Use Scenario: Retaining user preferences (seat position, climate settings, audio presets) across ignition cycles. IC Role / Device Role / Timing Role: Low-power serial EEPROM accessed during boot sequence and runtime profile switching. Use Value: 2.5V minimum VCC allows direct connection to 3.3V infotainment SoC rails; >200-year data retention guarantees settings persist beyond product warranty period. | Use Scenario: Storing motor phase advance curves and torque compensation tables calibrated per vehicle variant. IC Role / Device Role / Timing Role: Safety-relevant configuration memory accessed by ASIL-B compliant MCU during startup and fault recovery. Use Value: VCC brownout protection (1.5V VPOR) prevents partial writes during battery voltage sag - critical for functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76C-I/MNY | Industrial temp grade (–40°C to +85°C); same pinout, ORG/PE functionality, and electrical specs | Not qualified for under-hood or safety-critical automotive use; suitable for cabin electronics only | Select when automotive qualification is unnecessary and cost optimization is prioritized |
| AT25DF041A-MAHN-T | SPI interface (4-wire), 4 Mbit density, 2.7–3.6V VCC, no ORG/PE pins | Lacks hardware write protection and organization flexibility; requires different driver stack and layout | Choose only if higher density and SPI-native host interface outweigh loss of Microwire compatibility and PE control |
Compared with 93LC76C-I/MNY, the 93LC76CT-E/MNY adds automotive qualification and extended high-temp operation, while AT25DF041A-MAHN-T trades interface simplicity and hardware security for greater capacity and SPI ubiquity - neither offers drop-in replacement capability.
Availability
93LC76CT-E/MNY is available at Aetrix Electronics and suitable for engine control units, ADAS sensor modules, and electric power steering systems requiring stable component supply across extended automotive lifecycles.
Supply support for 93LC76CT-E/MNY includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog, FPGA, and memory solutions, serving automotive, industrial, and consumer markets with vertically integrated silicon and development tools.
The 93LC76C family was designed specifically for automotive and industrial applications demanding robust nonvolatile storage with hardware-enforced write protection, Microwire compatibility, and extended temperature operation - targeting ECU, sensor, and safety subsystems.
FAQ
What is the function of the ORG pin on the 93LC76CT-E/MNY?
The ORG pin on the 93LC76CT-E/MNY selects memory organization: logic high configures 512 × 16-bit mode, logic low configures 1024 × 8-bit mode. It must be statically tied to VCC or VSS - floating is prohibited. This pin is absent on A/B variants and exclusive to C-series devices like the 93LC76CT-E/MNY.
How does the Program Enable (PE) pin protect memory on the 93LC76CT-E/MNY?
The PE pin on the 93LC76CT-E/MNY must be driven high to allow EWEN, ERASE, WRITE, or WRAL commands. When PE is low, all programming functions are disabled regardless of EWEN state. This hardware lock prevents firmware bugs or voltage transients from corrupting stored calibration data - a critical feature for automotive use of the 93LC76CT-E/MNY.
What is the maximum clock frequency supported by the 93LC76CT-E/MNY at 3.3V VCC?
At VCC = 3.3V (within 2.5–4.5V range), the 93LC76CT-E/MNY supports a maximum clock frequency of 2 MHz per Table 1-2 (A1). This is confirmed by AC specification A1: "2 MHz" for 2.5V ≤ VCC < 4.5V. Exceeding this violates timing margins and may cause opcode misreads or incomplete writes on the 93LC76CT-E/MNY.
Does the 93LC76CT-E/MNY require external pull-up resistors on its I/O pins?
The 93LC76CT-E/MNY does not require external pull-ups on CS, CLK, DI, or DO for basic operation, as internal weak pull-downs exist on CS and DI per functional description. However, a 10 kΩ pull-down on CS is recommended (Section 2.3 note) to prevent accidental activation during power-up, and a series resistor between DI/DO is required in shared-bus configurations to avoid conflict - standard practice for the 93LC76CT-E/MNY.
What happens to the 93LC76CT-E/MNY during power supply brownout?
During brownout, the 93LC76CT-E/MNY's internal voltage detector (VPOR = 1.5V typ.) disables all write operations when VCC falls below threshold. This prevents partial writes and data corruption. Read operations remain functional down to VCC = 2.5V, but the device enters standby mode and ignores instructions until VCC stabilizes - ensuring safe behavior across the full automotive operating envelope of the 93LC76CT-E/MNY.
93LC76CT-E/MNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K x 8, 512 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
93LC76CT-E/MNY FAQ
1.How can I place an order for 93LC76CT-E/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76CT-E/MNY on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 93LC76CT-E/MNY reliable?
The price and inventory of 93LC76CT-E/MNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC76CT-E/MNY is usually 5 days.
3.What payment methods are accepted for 93LC76CT-E/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76CT-E/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76CT-E/MNY?
93LC76CT-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76CT-E/MNY order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 93LC76CT-E/MNY?
For technical support, including 93LC76CT-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76CT-E/MNY requirements.
6.How does Aetrix verify that 93LC76CT-E/MNY is sourced from the original manufacturer or authorized distributors?
All 93LC76CT-E/MNY products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 93LC76CT-E/MNY meets industry standards.
7.What is the process for return or replacement of 93LC76CT-E/MNY?
All 93LC76CT-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76CT-E/MNY, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 93LC76CT-E/MNY part is unused and in its original packaging.
Return procedure for 93LC76CT-E/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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